Paper piercer



E. KAESER PAPER PIERCER June26, 1951 2 Sheets-Sheet 1 Filed March 10, 1949 Filed March 10, 1949 June 26, 1951 EKAES R 5 v 2,558,567

' PAPER PIERCER 2 Sheets-Sheet 2 //v ram rm. Emt A EJER Patented June 26, 1951 PAPER PIERCER Ernst Kaeser, Biel, Switzerland Application March 10, 1949., Serial No. 80,613

In Switzerland March 12, 1948 2 Claims.

This invention relates to a perforator or'paper piercer of the type adapted for perforating letters and similar articles for filing them.

It is the object of the invention to provide a design of such perforator which is very small and adapted especially for travelling purposes.

Another object of the invention is to provide means by which the handling of the perforator is facilitated.

Further objects and features of the invention will be seen from the following detailed description in connection with the accompanying drawing showing by way of example and purely schematically some embodiments of the invention and in which:

Fig. 1 is a top view of one embodiment of my novel perforator,

Fig. 2 is a bottom view thereof,

Fig. 3 is a side view thereof,

Fig. 4 is a similar side view, but showing the perforator with the waste collecting reservoir in its open condition,

Fig. 5 is a cross section on line VV in Fig. 1,

Fig. 6 is a cros section on line VI-VI in Fig. 1,

Fig. '7 is a top view of a modified form of my novel perforator, the hinge being shown partly in section,

Fig. 8 is a cross section on line VIII-VIII in Fig. 7,

Fig. 9 is an enlarged view of the sectional portion of Fig. '7,

Fig. 10 is a section on line X-'X in Fig. 9,

Fig. 11 is a section similar to Fig. 10, but showing the plates in their closed position, and

Fig. 12 is a detail.

Similar reference numerals denote similar parts in the different views.

Referring now to the drawings in greater detail, and first to Figs. 1 to 6, it will be seen that the perforator or paper piecer consists of two plates l and 2 of flat iron or sheet iron of 1 mm. thickness each whose longitudinal edges are hingedly connected by a hinge 3 and pin 4. A plate spring 6 having two legs forming together an acute angle is arranged on said pin halfway between its ends, in a recess 5 of the hinge frame. The legs of plate spring 6 engage the insides of the plates l and 2 and keep the same open at an angle of about 30. The lower plate is provided with a pair of lower dies 1 and the upper plate is provided with a pair of upper dies or punches 8 fitting therein. A collecting reservoir or receiver 9 for the paper stampings is arranged on the lower side of plate I and hingedly mounted in the vicinity of hinge 3, 4, by means of hinge tongues I 0, on projections ll of plate I serving as pivots. Arranged in the middle of the free longitudinal edge of receiver 9 is a tongue member [2 which is adapted to be engaged under spring action in a recessed portion 14 at the free longitudinal edge of plate 2, by means of a rolled end portion [3, for locking the receiver 9 is a tongue member 12 which is adapted to be engaged under spring action in a recessed portion 14, at the free longitudinal edge of plate 2, by means of a rolled end portion I3, for locking the receiver 9 in its closed condition. In order to facilitate the feeding of a letter or the like which is to be perforated, between the plates l and 2, the free longitudinal end edges of said plates are slightly turned downwards or upwards, respectively.

The perforator so far described may be nickleor chromium-plated. In order to operate the same, a letter or the like is introduced between the two plates l and 2 and said two plates are then pressed together while holding the whole device in the hands of the operator or putting it on a table, thus piercing the letter or the like in the desired manner. The stampings are collected in the reservoir or receiver 9.

Referring now to the perforator shown in Figs. '7 to 12, the same is operated in the same manner as that described with reference to Figs. 1 to 6 and the design is the same with the following exceptions:

Two sleeves or bushings l5 and [6 put on the opposite ends of the hinge pin 4 limit the maximum angle which can be formed between the two plates I and 2. To this end, sleeve I5 is fixedly secured to said hinge pin '4 and provided with a recessed portion ll into which engage the flanks at the narrow edges of plates l, 2, whereby the swing movement of the plates is limited. The sleeve I6 is longitudinally slidable on pin i and is secured in its extreme position by a screw l8 screwed into pin 4. With its inner end the sleeve I6 is guided on hinge frame 6 and with a constricted portion [-9 engaging the screw head it is guided on pin 4. Mounted between the hinge frame 6 and the constricted portion [9 and enclosed with the sleeve is a compression spring 20 by which the sleeve is urged into its extreme position in which the constricted portion [9 lies against the screw head. At its inner end the sleeve I6 is formed with a recess 2|, 2| having two different widths in two steps, as shown. The shortened flanks of the plates I, 2 are thus permitted to swing within said recessed portions 2|, 2|, 1. e., with the sleeve pressed outwardly said flanks swing in the wider portion 2| of the recess and limit the maximum angle to which the plates can be opened, to an amount which is favorable for introducing the paper to be pierced. On the other hand, when the plates I, 2 are closed, the sleeve Hi can be pressed inwardly, so that the narrow part 2! of the recess rides on the flanks of plates I, 2, securing the plates in this position. In order that the sleeve It may be auto matically secured in its pressed-in position by engagement of the flanks of the plates in the narrow part 2! of the recess, the flanks of part 2| is constricted towards the end of the sleeve.

The flanks of the plates engaging recess 2| are turned up in accordance with the slanting position of the flanks of recess 21, thus ensuring a reliable engagement with the sleeve which cannot be overcome by the pressure of spring 20.

The outward position of the sleeve is secured by the spring 28. v

- Bolstering rings 22 of rubber sponge are put on the upper dies or punches 8 and connected with plate 2 by an adhesive. These bolster rings serve to eject the pierced paper from the punches simultaneously with the opening of plate I, 2, so as to permit unhampered withdrawal of the pierced paper from the perforator.

As various possible embodiments might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A paper piercer, comprising a pair of hingedly connected plates, one of said plates in cluding the lower dies and a receiver for collecting the paper stampings and the other plate in cluding the upper dies, and a pair of sleeves mounted on the opposite ends of the hinge pin and having each a recess in which the flanks of said plates can swing, one of said sleeves being slidable on said pin and having a stepped recess with two different widths, in such a way that in the outwardly shifted position of said sleeve said flanks of the plates are allowed to swing within the wider part of the recess while in the inwardly shifted position of the sleeve the narrow part of said recess locks said plates in their closed position.

2. A paper piercer, comprising in combination a pair of rectangular plates hingedly connected at one of their longer sides, one of said plates including a pair of lower dies spaced from each other by the standard distance of the studs of file wrappers and a flat receiver conforming to said plate for collecting the paper stampings, and the other plate including a pair of upper dies cooperating with said lower dies, a hinge pin, and means including a spring and an axially recessed sleeve on each of the two opposite ends of the hinge pin, the flanks of the recesses being adapted to be engaged by said plates, for keeping said plates open at an angle permitting the feeding of paper into the piercer for the piercing thereof by manual compression of the plates, without additional lever means; said piercer in its compressed condition forming a flat rectangu lar body.

ERNST KAESER.

REFERENCES CITED The following references are of record in the file of this patent: v

UNITED STATES PATENTS Number Name Date 310,917 Shannon Jan. 20, 1885 466,8 i7 Dassmann et a1. l Jan. 12, 1892 1,282,934 Postlewaite Oct. '29, 1918 1,827,180 Williams Oct. 13, 1931 1,948,187 Randell "11 Feb. 20, 1934 2,017,195 Anderson et al Oct. 15, 1935 2,202,894 Bihler June 4, 1940 

